Uv curable nail coating compositions

Abstract

This invention relates to the use of cationically UV curable compositions to coat nails, cationically UV curable nail coating compositions and methods of making up nails using said compositions. In a preferred embodiment, the cationically UV curable nail coating compositions comprise at least one epoxy resin. The epoxy resin may be of plant origin.

1 . Use of a cationically UV curable composition as a nail coating composition. 
     
     
         2 . A method of coating a nail comprising applying a layer of a cationically UV curable composition to the nail and cationically curing the layer using UV radiation. 
     
     
         3 . A use according to  claim 1  or method according to  claim 2  wherein the cationically UV curable composition comprises at least one epoxy resin. 
     
     
         4 . A use or method according to  claim 3  wherein the epoxy resin comprises at least one epoxide-containing fatty acid ester. 
     
     
         5 . A use or method according to  claim 4  wherein the epoxide-containing fatty acid ester is of plant origin. 
     
     
         6 . A cationically UV curable composition for coating nails which comprises at least one epoxy resin and a cationic photoinitiator. 
     
     
         7 . A cationically UV curable composition according to  claim 6  which has a viscosity of at least 10 mPa.s. 
     
     
         8 . A cationically UV curable composition according to  claim 6  or  claim 7  which comprises a photosensitiser. 
     
     
         9 . A cationically UV curable composition according to any one of  claims 6  to  8  wherein the epoxy resin comprises at least one epoxide-containing fatty acid ester. 
     
     
         10 . A cationically UV curable composition according to  claim 9  wherein the epoxide-containing fatty acid ester is an epoxide-containing fatty acid triglyceride, monoalkyl ester or monoallyl ester. 
     
     
         11 . A cationically UV curable composition according to  claim 10  wherein the epoxide-containing fatty acid ester is an epoxide-containing fatty acid triglyceride having an average number of epoxide groups per triglyceride molecule of at least 3. 
     
     
         12 . A cationically UV curable composition according to any one of  claims 9  to  11  wherein the epoxide-containing fatty acid ester has one or more fatty acid carbon chains of length C8 to C22. 
     
     
         13 . A cationically UV curable composition according to any one of  claims 9  to  12  wherein the epoxide-containing fatty acid ester is of plant origin. 
     
     
         14 . A cationically UV curable composition according to  claim 13  wherein the epoxide-containing fatty acid ester is derived from a plant oil selected from Borage, Calendula, Camelina, Castor, Coconut, Cottonseed, Crambe, Echium, Hemp, Jatropha, Jojoba, Lequerella, Linseed, Lunaria, Meadowfoam, High Erucic Rape, Rape, Safflower, Sunflower, Soya, Tung, Vernonia and Walnut oil. 
     
     
         15 . A cationically UV curable composition according to  claim 13  wherein the epoxide-containing fatty acid ester contains one or more fatty acid chains associated with one or more of oleic acid, linoleic acid, alpha linolenic acid and gamma linolenic acid. 
     
     
         16 . A cationically UV curable composition according to  claim 13  wherein the epoxide-containing fatty acid ester is derived from a plant oil which comprises:
 (i) greater than 15% alpha linolenic or gamma linolenic acid and at least 15% linoleic acid; (ii) greater than 50% linoleic acid and greater than 20% oleic acid; (iii) greater than 70% linoleic acid and at least 10% oleic acid or (iv) greater than 70% vernolic acid, expressed in terms of the equivalent molar percentages of the free fatty acids in said plant oil. 
 
     
     
         17 . A cationically UV curable composition according to any one of  claims 9  to  16  which comprises at least one further epoxy resin chosen from cycloaliphatic epoxides and aromatic epoxides. 
     
     
         18 . A cationically UV curable composition according to  claim 17  wherein the further epoxy resin is 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate or Bisphenol A diglycidyl ether. 
     
     
         19 . A cationically UV curable composition according to any one of  claims 6  to  18  wherein the total amount of epoxy resin is from 30 wt% to 90 wt%, based on the total weight of the composition. 
     
     
         20 . A cationically UV curable composition according to any one of  claims 9  to  19  wherein the composition comprises at least one epoxide-containing fatty acid ester and the total amount of epoxide-containing fatty acid esters is from 5 to 70 wt %, based on total weight of the composition. 
     
     
         21 . A cationically UV curable composition according to any one of  claims 6  to  20  which is clear when cured. 
     
     
         22 . A cationically UV curable composition according to any one of  claims 6  to  20  which comprises a pigment. 
     
     
         23 . A use according to any one of  claims 1  or  3  to  5  or a method according to any one of  claims 2  to  5  wherein said cationically UV curable composition is according to any one of  claims 6  to  22 . 
     
     
         24 . A cured nail coating composition obtainable by the method of  claim 23 . 
     
     
         25 . A use according to any one of  claims 1 ,  3  to  5  and  23  or a method according to any one of  claims 2  to  5  and  23  wherein said nail is a coated nail. 
     
     
         26 . A method according to any one of  claims 2  to  5 ,  23  and  25  which comprises applying a layer of said composition to the nail and placing nail decorations on said layer prior to curing the layer with UV radiation. 
     
     
         27 . A method of coating a nail according to  claim 23  wherein said cationically UV curable composition forms a clear layer when cured and is according to  claim 21 , and said coated nail is coated with either a nitrocellulose-based colour coat or a cured (meth)acrylate-based colour coat. 
     
     
         28 . A method of coating a nail according to  claim 27  which further comprises either (i) applying a nitrocellulose based colour layer to the nail and drying the layer, or (ii) applying a UV curable (meth)acrylate-based colour layer to the nail and curing the layer using UV radiation, prior to applying a clear layer according to the method of  claim 23  when the cationically UV curable composition is according to  claim 21 . 
     
     
         29 . A method of coating a nail according to  claim 23  wherein said cationically UV curable composition forms a colour layer and is according to  claim 22 , and said coated nail is coated with a clear nail composition according to  claim 21  which is cured. 
     
     
         30 . A method of coating a nail according to  claim 29  which further comprises applying a clear layer according to the method of  claim 23  when the cationically UV curable composition is according to  claim 21  prior to applying a colour layer according to the method of  claim 23  when the cationically UV curable composition is according to 22. 
     
     
         31 . A method of coating a nail according to  claim 30  which further comprises applying a UV curable (meth)acrylate-based base layer to the nail and curing the layer using UV radiation prior to applying the clear layer. 
     
     
         32 . A layered nail coating system comprising:
 a cured (meth)acrylate-based base layer;   a cured clear layer according to  claim 24  wherein the cationically UV curable composition is according to  claim 21 ; and   a cured colour layer according to  claim 24  wherein the cationically UV curable composition is according to  claim 22 .   
     
     
         33 . A layered nail coating system comprising:
 a nitrocellulose-based or cured (meth)acrylate-based colour layer; and   a cured clear layer according to  claim 24  wherein the cationically UV curable composition is according to  claim 21 .